Under the project "Extension and reconstruction of the wastewater treatment plant and organization of water and sewage management in Łomża" works are carried out leading to the launch of a new biogas path and the introduction of modernized facilities such as a biological reactor with a variable zone (denitrification - nitrification) for initial operation. Currently, works related to the renovation of the existing steel structure of the staircase at the digester chamber have been completed, which will be covered with sandwich panels.